My house is in northern NJ and it had a radon level of 6 (pico curries?) when I bought it. When I moved in, I had a certified contractor install a subslab ventillation system to "mitigate" the problem. Since the system was installed, my basement reading has dropped from 6 to about 1. At that level, the contractor told me not to worry about it anymore and that they do not suggest any further actions to try to reduce it even more.

So now my basement reads 1, the main floor reads about .6 and the upstair bedroom area is about half that. The "experts" state that outside air in NJ averages .3 or better.

But yet I'm still concerned about this level. I do not use the basement for other than storage and laundry (which is bad since i was planning to finish it and turn it into a game/family room.)

The next step I'm considering is to re-seal the entire basement (concrete floor and block walls) with a "radon-resistant" paint such as SANITRED. This would be a big job since the floors and walls would need to be stripped of the existing paint down to the bare surface for the SANITRED to be applied.

Even after i go through this process, I know there is no guarentee that the sealer would reduce the level significantly.

My main concern is that I have a 2 year old child and I want the house as healthy as possible for him.

Any ideas? Should I just stop worrying about it? Should I try other in-house air exchange systems?

Thanks.

2 Cents